Usually when you have a turn signal blinking faster than normal you have a bulb or partial bulb burned out.
Do a turn signal light check, checking all the lights for running and blinking conditions. (You do do that as a pre-ride check anyway, right?), Stock Front turnsignals are dual filament for running and blinking, rear stock are single filament for blinking only.
The only other condition would be if you had replaced some with LEDs and then you would need a load equalizer, but you didn't mention any recent replacements.
Patriot Guard Rider
2000 VN750 Sere (Serendipity)
1990 GL1500 (Ole Blue)
1986 VN750 EVie (project bike, heavy custom)
VROC # 11628 / 25000-H
ARVROC # 12 Coordinator and Crowd Control
OKVROC # 18 (H)
TNVROC # 45 (H)